Postive shutoff device



Sept. 4, 1951 P. c. LIVESAY 2,566,343

POSITIVE SHUTOFF DEVICE Filed July 5, 1944 In ve n for Paflj/ Craig L/vesay .4/2orney Patented Sept. 4, 1951 i iv g i '51 Y UNITED STA'iaS Fell ni's? QFFECE PQSITIVE SHUTOFF- DEVICE Patty flraig- Livesay, Hammond, Ind., assignor to Standard Oil Company, Chicago, 111., a corporationiof Indiana,

Application July 3, 1944, Serial No. 543,277

7 Claims. (Cl. 251M167) Thisjnvention relates to a special type-of fiow the: latch means 2 i is secured. In the drawings, controlvand; coupling apparatus employed where the latch means comprises bolt 2! and nuts, it is desiredctoi-eilecttemporary but positive 2223. When the tension is removed from the shutoff of; aggiven conduit. bolt 2|, the latch can be removed easily to permit:

In various refinery operations it may become 5 the manipulation of'the figure 8 blind Z lWithout necessary; to block; completely a transfer linefor the use of tools. The nuts}? and- 23can be tack a: given time andfor this service a gate or welded on bolt zl in the desired position, and the valve: is i not satisfactory; experience having latch assembly-canbe fixed by a light chain 213' taughtthat valves of-thistype do notprovide to pipe clamp 29 toprevent its loss. In some inreally positive shutofi. Various elaboratemechastancessit will be advantageous, to provide. the nisms havegbeen proposedior effecting such a shankrofcthe figure iirblind with a slot forthccutOfI', but lingeneral, these devicesare expensive bolt 21 Inasmuchasbolt 2 I can-be lifted from. andcumbersomei OneCmethod of ehfecting the the. ahparatus, the figure 8- blind can be pivoted cutoff is to separate the pipe flanges by unbclting, about the bolt 21 andathen both elements re inserting a blind between them, and rebolting. 6 placeiii asa unit. A; grease fitting 25; has been This latter expedient requiresthe use-of wrenches provided: throughplate l5 and. sleeve it so thatto'remove'studs; and mayrequire the services of thesev elements can be keptgreased and.- in good; a pipefitter; working order,

Therefore, it is anobjectof myinvention to The sleeve l4, which is; threaded into the plate provide a simple and foolproof apparatus for ef- 2U itcan berotated manually wth the aid of ele fecting a positive cutoff in a: transfer line. It is ments iiiaand since the sleeve is threaded a further object to provide a heavy dutyam a tendency to; move toward the flange it and paratus having: a: minimumof moving parts; urges the plate I5; away from the flanges, lfizand, Another object is to provide'a mechanism which H; places tension in thepstudbolts. l6; andr' can be operated without theuseofwrenches or 21 which pullthe flange ll toward flange it, mechanics tools and with a minimum amount of flange Illopposingthe longitudinal movementof effort. These and other objects will become ap- Sleeve-Jig; This action causes the flanges iii; and parent" asl the description of myinvention proiito be: moved; toward each other and to clamp ceeds with reference to the drawings wherein securely thefigure iliblind, 24L'betWeen them. The

Figure 1 is a side view of the assembly, partly- 30 figure ii blind 24; can; be provided with suitable ingsection taken along the line l--i of Figure 2; gasket; surfaces Silgto effect, a leakproof-seal.

Figure 2 is an end viewof the mechanism in an When the, directionof rotation vof, the sleeve-iii operatinghposition; is reversed, the sleeve tends to meveawayfrom- Fi-gureB is a detail of the figure 8 blind; and, the rla-nges lil and H but islprevented from doing Figure ii-lee a fragmentary view along line 4-1 3:

so bythe; stop 21 illustrated as a clamp about the in FigureLandillustrates-thecooperation of the pipe [2,; The plate. 15 then tends to force: stud;

stop meanswiththe draw members. bolts. IE and-villab'ackthrough the. flanges ifi The-deviceconsists essentially of an auxiliary and 1.1.] he wings-28a of the clamp Edi-opposemechanismior separatinga pair oi -pipe flanges the movementiof i6 andifia. Itis contemplated, to permit the insertion of-a flow: control meansv in howevenithat equivalent means. such 21051315161 without using a wrench or disturbing the bolting. about conduit ;I3betw een, the dance H 9 811 11 Ina preferred embodiment a figure fi blincl fur QQT'CHSO. berprovided. In any event by exerting nishes the-means of changingfrom a flowing forces in opposite directions to thestopgmeans: condition to a positive shutoffi condition; fire-11121129, the fianges l firand I! are forced apart;

With particular reference to the drawings, .5 When thevfianges Wand l-l'separate, the ends flanges I0; and H are threadedor fixedby some of the figure $3. blind 24. can be reversed very other meansuto the-ends ofypipes I2 and it; A quickly and With little effort. If desired two threaded-sleeve i4 isuprovided about the pipe 12 separateelements one disc and the other-an behindthewnear flange l0. andga'n annular plate annulus can beused in'place of the figured blind [Bisthreaded onto thesleeve I41. FIa-ngestud :v-o TheZfigure-Bbblind 24; has the advantage of probolts l6 and ifict are run-through-the flanges I'll viding aivisualgindieation as towhether' or not;

and H and engage theplate 15. When. the bolts the;pipeisrflowingor isishutofii 1 are; threaded into-the -plate [5; set screws 5'! can Although myinvention has been described with be pmvided to retain them. Theifianges Iii and: reierence to; particular. embodiments thereof: it

l lwandp ate lihflvejslqts l8, l9; and 20in which.

should, be understood that modifications and ai-:

3 tratlons can be made therein without departing fioi'fi the scope or ifiy invention; Theapparatus described in moreor less detail is for the purpose of illustration only, and it is intended that the scope of the invention is defined by the appndd c1a1ms.

11 claim:

1. An improvement in disc valves comprising in combination a pair of opposed conduits having adjacent flanges, a disc interpo's'able therebetween, and means for securing the flanges in tight relation with the disc following interpo= sition of the disc and for relatively spreading the adjacent conduit ends for interchange of discs, said means including an externally threaded sleeve mounted on one of said conduits, an annular plate threaded on said sleeve, a plurality of rigid draw members rigidly connected to said annular plate and adapted to slidably engage the flange on the other of said conduits in a manner limiting maximum separation of said annular plate and said flange as well as relative rotation thereof, stop means on each of said conduits, one positioned to engage said sleeve and the other to engage at least one of said rigid draw members, and a latch means slidably carried in radially extending slots in said annular plate and said flanges, said latch means being removable therefrom when said conduits are parted.

2. A positive shutofl device adapted for temporarily blocking a line comprising first and second conduits, a flange on each of the adjacent ends of said conduits, a flow control member adapted to be disposed between said flanges, a

sleeve about the first of said conduits, an annular plate threaded to said sleeve, radially extending arms affixed to said sleeve, a plurality of tapped holes in said annular plate and a plurality of drilledholes in said flanges registering with said tapped holes, a radial slot in each of said flanges and said plate, said slots being in substantially longitudinal alignment, a removable latch means carried in said slots, bolts slidably disposed within the holes in said flanges with the heads abutting the remote surface of the flange on the second conduit and the shanks threading into said plate whereby said bolts are normally in tension, a

first thrust means fixed to said first conduit, and

a second thrust means fixed to said second conduit, said first and second thrust means co-acting with said sleeve and with said bolts, respectively to place said bolts in compression and to part said flanges.

3. An apparatus for temporarily blocking a conduit comprising a pair of flanges on adjacent ends of first and second conduits, a movable sleeve about the first of said conduits adjacent one of said flanges, arm means fixed to said sleeve adapted for applying torque to said sleeve, an annular plate threaded to said sleeve, bolt means passing through said flanges and threaded into said annular plate, an additional bolt means comprising a removable latch carried in radial slots, said latch being removable without disturbing the remaining bolt means threaded into said annular plate, stop means associated with the first of said conduits for limiting the longitudinal movement of said sleeve away from the flange on said first conduit, and second stop means associated with the second of said conduits for limiting the longitudinal movement of said bolt means with reference to the flange on said second conduit, whereby the flanges are urged toward each other when said plate is drawn away from said flanges by rotating said sleeve and the 4 said stop means coact with the bolt means to cause the flanges to move away from each other.

4, A positive shutoff device for conduits com prising a first and second conduit, flanges on said conduits, a removable flow control member adapted to be secured between said flanges,- a movable sleeve about one portion of said first condiiit, an annular plate threaded to saidsmeve, rigid draw means extending through said flanges, one end of said draw means threading into said annular plate and the other end having shoulder means for abutting the remote surface of the flange of the second conduit, a radial open slot at the periphery of each of said flanges and said plate, said slots being in substantially longitudinal alignment with reference to said conduits, an independently removable latch member carried in said slots, means for limiting the longitudinal movement of said sleeve along said first conduit, and means carried by said second conduit adapted to co-act with said draw means for opposing the longitudinal displacement of said plate with reference to said second conduit.

5. A coupling device for a pair of flanged conduits comprising a movable sleeve adjacent the flange of a first conduit, an annular plate threaded to said sleeve, a removable flow control member between said flanges, a plurality of rigid draw means passing through said flanges and longitudinally movable therethrough, said draw means fixedly terminating in said annular plate and having a shoulder means for movably abutting the remote surface of the flange of the second conduit whereby said plate and flanges are not rotatable in respect of each other, radially extending arm means carried by said sleeve for rotating said sleeve whereby said annular plate 'being threaded to said sleeve is moved longitudinally of said conduit, stop means associated with said first conduit adapted to limit the longitudinal movement of said sleeve away from the flange carried by said first conduit, and a second stop means carried by said second conduit adapted to co-act with at least one of said draw means to oppose the longitudinal movement of said annular plate toward said second conduit.

6. A positive shutofi device for conduits comprising in combination a first and second conduit having flanges on adjacent ends thereof, a rotatable sleeve carried by said first conduit adjacent the flange thereon, substantially radially extending arm means fixed to said sleeve, means on said first conduit for limiting the longitudinal movement of said sleeve, an annular plate threaded on said sleeve, a plurality of rigid draw means threaded into said plate slidably passing through said flanges, each of said draw means having at its free end an abutment engaging the flange of the second conduit, a flow control means adapted to be secured between said flanges when said draw means are in tension, a radial slot in each of said flanges and plate in substantial lonc prising a combination of opposed first and second conduits, a flange on each of the adjacent ends of said conduits, said flanges having a plurality of symmetrically arranged holes and a radial slot through the periphery, the symmetri-' cally arranged holes andslots of said flanges being in substantial axial alignment, a rotatable sleeve carried by said first conduit adjacent the flange thereof, an annular plate threaded on said sleeve having tapped openings and a slot in alignment with the corresponding openings and slot in the flanges, initially adjustable rigid draw means threaded into the said tapped openings in the annular plate, set-screw means in said plate adapted to lock said threaded draw means in position, an adjustable latch means carried in said radial slots, said latch means having spaced shoulder means adapted to engage the remote surface of said plate and the flange on said second conduit adapted to be placed in tension and limit the maximum separation and relative rotation of the flanges and annular plate, 15

6 said stop means being adapted to take the thrust of the draw means when in compression, a flexible anchor means fixed to said stop means and said latch means, and a removable flow control element disposed between said flanges.

PATTY CRAIG LIVESAY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,339,970 Young Jan. 25, 1944 2,340,499 Zachow Feb. 1, 1944 2,336,893 Hamer 1 Oct. 16, 1945 

